Reality TV’s biggest star — who shocked the world in filing for divorce from her husband of 72 days, NBA forward Kris Humphries, on Monday — abruptly changed her weekend plans Thursday, canceling the rest of her stay in Australia to return to the states immediately.

The socialite walks away from a slate of lucrative promotional appearances, including what would have been a $150,000 payday for appearing on behalf of Swisse vitamins at the Melbourne Cup Carnival Saturday.

“I am very disappointed that I am unable to attend the Swisse marquee,” Kardashian told Australian paper The Herald Sun, “but I hope to come back and work with the Swisse team at another point in time.”

She continued, “I love our fan base out here. Of course I do really want some time to myself and it has been tough. But I didn’t wanna bail on everyone and, you know, skip out on this commitment.”

Earlier Thursday, the beauty (accompanied by sister Khloe, who’s leaving as well) sported a sullen stare appearing at Sydney’s David Jones city store in support of her line.

As we previously reported, Hollywood attorney Laura Wasser will represent Kim in the split; the duo reportedly has a prenuptial agreement in place.

Kardashian and Humphries tied the knot August 20 in a lavish wedding that was shown on E!’s Kim’s Fairytale Wedding: A Kardashian Event. The wedding broadcasts racked up huge ratings, averaging 4.4 and 2.7 million viewers, respectively, on consecutive nights.